C#下载功能代码

using System; 
using System.Data; 
using System.Configuration; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using System.IO;  
  
   
  
public partial class _Default : System.Web.UI.Page  
{ 
 protected void Page_Load(object sender, EventArgs e) 
 { 
  
 } 
  
 //TransmitFile实现下载 
 protected void Button1_Click(object sender, EventArgs e) 
 { 
 /* 
 微软为Response对象提供了一个新的方法TransmitFile来解决使用Response.BinaryWrite 
 下载超过400mb的文件时导致Aspnet_wp.exe进程回收而无法成功下载的问题。 
 代码如下： 
 */
  
 Response.ContentType = "application/x-zip-compressed";